their goal is a safer cleaner environment for everyone who uses the system. >> when it comes to the nonviolent acts, it's going to take three acts in 90 consecutive days to get a prohibition order. >> reporter: passengers have mixed reaction. >> i support dealing with criminals in whatever way they need to be dealt with, but i just hope that it doesn't carry over. for instance, i'm not a criminal and i wouldn't commit vandalism or anything, but now or another i don't want to be profiled. >> i'm worried about my rights, yes, definitely. >> this law would pretty much put people into -- i think it would be an outrage. >> if someone actually stabs somebody next to them or is involved in serious bad issues, i think that's absolutely reasonable to ban them as long as there is a process in place to make sure it's not something minor. >> reporter: one of the questions that's come up, can protesters be banned? officials say while they can take action against someone who interferes with trains, they tell us the law is not aimed at protesters. >>> shares of palo alto's tesla slipped lower today while the